Global gyrokinetic simulations of electromagnetic turbulence in stellarator plasmas
Alexey Mishchenko, Matthias Borchardt, Roman Hatzky, Ralf Kleiber, Axel Könies, Carolin Nührenberg, Pavlos Xanthopoulos, Gareth Roberg-Clark, Gabriel G. Plunk
Abstract
Global electromagnetic turbulence is simulated in stellarator geometry using the gyrokinetic particle-in-cell code EUTERPE. The evolution of the turbulent electromagnetic field and the plasma profiles is considered at different values of the plasma beta and for different magnetic configurations. It is found that turbulence is linearly driven at relatively high toroidal mode numbers. In the nonlinear regime, lower toroidal mode numbers, including zonal flows, are excited resulting in a quench of the linear instability drive. The turbulent heat flux is outward and leads to the nonlinear relaxation of the plasma temperature profile. The particle flux is inward for the parameters considered. The effect of the parallel perturbation of the magnetic field on the stellarator turbulence is addressed.
BibTeX
@article{Mishchenko_2023,
title={Global gyrokinetic simulations of electromagnetic turbulence in stellarator plasmas},
volume={89},
ISSN={1469-7807},
url={http://dx.doi.org/10.1017/s0022377823000363},
DOI={10.1017/s0022377823000363},
number={3},
journal={Journal of Plasma Physics},
publisher={Cambridge University Press (CUP)},
author={Mishchenko, Alexey and Borchardt, Matthias and Hatzky, Roman and Kleiber, Ralf and Könies, Axel and Nührenberg, Carolin and Xanthopoulos, Pavlos and Roberg-Clark, Gareth and Plunk, Gabriel G.},
year={2023},
month=May }